Survival and hope are also prevalent themes. Since the original Attack on Titan story is quite dark, in alternate endings, fans often write about how the characters find hope in the most desperate situations and strive for survival in different ways. For instance, they might find new methods to deal with the Titans or new ways to build a future for humanity that doesn't involve constant bloodshed.
There could also be an alternate ending where the Titans are revealed to be part of a much larger, more complex experiment by an ancient civilization. The characters in AOT then have to work with the outside world to not only stop the Titans but also to deal with the implications of this discovery. This ending usually involves a lot of world - building and exploration of the lore behind the Titans, and it can be quite interesting as it gives a whole new perspective on the story.
It's fairly common. Fans often look for more content related to their favorite shows. Since 'Attack on Titan' has a large and passionate fan base, there are a lot of fanfics available. 'Aot' fans might watch (read) these fanfics to explore different scenarios that the official story didn't cover. For example, they might want to see how a certain character would react in a different situation or what would happen if a major plot event had a different outcome.
There could be various fanfictions. Maybe some that focus on alternative endings, like ones where certain characters survive who didn't in the original. For example, a fanfiction where Erwin survives and leads the Scouts in a different way.
It could mean that a person who is a fan of 'Attack on Titan' (AOT) is reading or watching fan - created fictional works related to AOT. Maybe they are interested in seeing different interpretations or storylines that fans have come up with.
One way is to check on popular fanfiction websites. Look for ones with high ratings and a lot of reviews. For example, Archive of Our Own (AO3) has a large collection of AOT fanfictions. You can search for the most popular ones there.
Definitely not. AOT is a work of fiction that combines elements of fantasy, action, and drama. It's set in a made-up world with its own unique plot and characters.
The AOT manga has finished. It wrapped up all the major plotlines and provided a conclusion to the story that fans have been following for a long time.